Melissa Isaak, Mr Moore's attorney, said at Monday's press conference in Gadsden, Alabama that the women who accused him did so with the hopes that he would lose the 12 December election.

"We intend to show the people of Alabama that a political conspiracy came about to ruin his campaign for Senate and to defame him, to defame his character so the people of Alabama would not vote for him in the special Senate election," she said.

The complaint states that the accusations of events that "supposedly" occurred years ago "coincidentally surfaced for the first time within a seven-day period, a mere 32 days before the December 12 general election."

It also claims that Ms Gibson revealed her "true political agenda" through comments on social media where she expressed support for Mr Moore's Democratic opponent, Doug Jones.

Ms Gibson did not immediately respond to a request for comment.

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Media caption'I was terrified' says Moore accuser

Ms Corfman filed a defamation lawsuit against Mr Moore in January, after he denied her accusations that he undressed and touched her when she was 14 years old and he was 32.

"These latest claims by the Moore camp have no more merit than those he has made before," Neil Roman, Ms Corfman's lawyer, told the Birmingham News in a statement.

"Ms Corfman is no longer a teenager and is not going to let Mr Moore victimise her again."

Tina Johnson, who alleges that Mr Moore groped her in 1991 when she was 28, is also among the defendants.